US20200132924A1 - Lighting device and display device - Google Patents
Lighting device and display device Download PDFInfo
- Publication number
- US20200132924A1 US20200132924A1 US16/661,560 US201916661560A US2020132924A1 US 20200132924 A1 US20200132924 A1 US 20200132924A1 US 201916661560 A US201916661560 A US 201916661560A US 2020132924 A1 US2020132924 A1 US 2020132924A1
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- United States
- Prior art keywords
- frame
- section
- chassis
- bottom plate
- side extending
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
Definitions
- One of the pair of the substrates on the back side is an array substrate and switching components (such as TFTs), pixel electrodes, and an alignment film are arranged on the array substrate.
- the switching components are connected to source lines and gate lines that are perpendicular to each other.
- the pixel electrodes are connected to the switching components.
- the other one of the substrates on the front side is a CF substrate.
- Color filters, a counter electrode, and an alignment film are arranged on the CF substrate.
- the color filters include color portions of red (R), green (G), and blue (B) that are arranged with predetermined alignment.
- the present embodiment is configured to include the cushion tape 135 (one example of cushioning material) between a bottom plate 122 of the chassis 121 and a chassis-side extending section 132 of the reinforcing member 130 .
- the space between the bottom plate 122 and the chassis-side extending section 132 can be filled with the cushion tape 135 that can follow deformation.
- the cushion tape 135 is made of porous material that is good in shock absorbing properties.
- the cushion tape 135 has a belt-like shape extending along a long-side outer edge of the bottom plate 122 of the chassis 121 and is attached to the chassis 121 with a double-sided adhesive tape.
- the reinforcing members 230 may be provided in any numbers and any directions.
- the reinforcing members 230 are preferably disposed so as to restrict distortion and twisting of the backlight unit 220 caused by distortion of the reinforcing member 230 itself.
- the liquid crystal display device and the backlight unit may have various shapes such as a fan shape, a polygonal shape, and an oval shape.
Abstract
A lighting device includes a light exit member, a chassis including a bottom plate, a wall that extends from an outer peripheral portion of the bottom plate, a frame including a frame section opposite the bottom plate and covering an open edge of the open section, and a wall cover section extending from an outer peripheral edge of the frame section toward the bottom plate and coveting an outer periphery of the wall, and a reinforcing member disposed on a portion of an outer periphery of the frame and including a frame-side extending section extending along the outer periphery of the frame and overlapping the frame section, a chassis-side extending section disposed opposite the frame-side extending section, and the frame-side extending section and the chassis-side extending section holding the frame section and the bottom plate therebetween, and a connecting section connecting the frame-side extending section and the chassis-side extending section.
Description
- This application claims priority from Japanese Patent Application No. 2018-203713 filed on Oct. 30, 2018. The entire contents of the priority application are incorporated herein by reference.
- The technology described herein relates to a lighting device and a display device.
- A liquid crystal display panel is generally used as a display panel displaying an image or information in devices including electronic devices such as information terminals and meters mounted in a vehicle such as an automobile. Such a liquid crystal display panel does not emit light and therefore, such a type of liquid crystal display device includes a backlight unit (a lighting device) that supplies light to the liquid crystal display panel.
- The backlight unit is generally classified into a direct type and an edge light type according to arrangement of a light source. The edge light type backlight unit is preferably used to reduce a thickness of the liquid crystal display device.
- One example of such a liquid crystal display device includes a light source, a light guide plate, a reflection sheet, a metal chassis, and a resin frame. The light guide plate has a light entering surface that is opposite the light source and a light exit surface that faces a front side and through which the light exits. The reflection sheet is disposed to cover a plate surface of the light guide plate that is an opposite surface from the light exit surface. The light source, the light guide plate, and the reflection sheet are arranged in the metal chassis and the metal chassis includes a bottom plate that extends along the reflection sheet. The light guide plate is arranged between the resin frame and the metal chassis. Such a liquid crystal display device is described in Unexamined Japanese Patent Application Publication No. 2010-9787.
- There have been demands of increase of size and decrease of thickness in display devices. According to such demands, the backlight unit is increased in size and decreased in thickness, and rigidity becomes poor and deformation such as warping or curving is likely to be caused in the backlight unit. As a result, luminance unevenness may be caused in the display device. If the backlight unit without having enough rigidity is included in a display device and such a display device is mounted in a vehicle and used under vibration, components of the backlight unit may be deformed due to the vibration and hit each other, and this may create noise.
- To solve such a problem, the rigidity of the resin frame may be increased. However, the frame is formed to have relatively low rigidity to absorb distortion, a mounting tolerance, or twisting as a whole that is caused by the mounting tolerance. Therefore, increase of the rigidity of the frame may directly cause distortion of the backlight unit as a whole. Thus, there have been demands in the backlight unit to obtain both of flexibility of absorbing distortion or twisting and rigidity for keeping a shape thereof.
- An object of the technology described herein is to provide a lighting device and a display device in which deformation such as warping or curving caused by increase of size and decrease of thickness of a display device is less likely to be caused and distortion or twisting is less likely to be caused and also noise is less likely to be caused even if the device is vibrated.
- A lighting device according to the technology described herein includes a light exit member configured to exit light, a chassis including a bottom plate, a wall that extends from an outer peripheral portion of the bottom plate, and an open section opposite the bottom plate, the chassis in which the light exit member is arranged, a frame including a frame section and a wall cover section, the frame section being disposed opposite the bottom plate and covering an open edge of the open section, and the wall cover section extending from an outer peripheral edge of the frame section toward the bottom plate and covering an outer periphery of the wall, and a reinforcing member disposed on at least a portion of an outer periphery of the frame, the reinforcing member including a frame-side extending section extending along the outer periphery of the frame and overlapping the frame section, a chassis-side extending section disposed opposite the frame-side extending section, and the frame-side extending section and the chassis-side extending section holding the frame section and the bottom plate therebetween, and a connecting section disposed on an outer side of the wall cover section and connecting the frame-side extending section and the chassis-side extending section.
- A display device according to another technology includes the above lighting device and a display device.
- According to the lighting device and the display device of the present technology, deformation such as warping or curving caused by increase of size and decrease of thickness of a display device is less likely to be caused and distortion or twisting is less likely to be caused and also noise is less likely to be caused even if the device is used with being vibrated.
-
FIG. 1 is an exploded perspective view of a liquid crystal display device according to a first embodiment. -
FIG. 2 is a plan view of a backlight unit. -
FIG. 3 is a cross-sectional view of the liquid crystal display device including a reinforcing member. -
FIG. 4 is an enlarged cross-sectional view of a part of the liquid crystal display device according to a second embodiment including a reinforcing member. -
FIG. 5 is a plan view of a backlight unit according to another embodiment. -
FIG. 6 is a perspective view of a liquid crystal display device according to another embodiment. - A liquid crystal display device 10 (an example of a display device) according to a first embodiment will be described with reference to
FIGS. 1 to 3 . X-axis, Y-axis and Z-axis may be indicated in each of the drawings. The axes in each drawing correspond to the respective axes in other drawings. A vertical direction is illustrated with reference toFIG. 3 and an upper side and a lower side correspond to a front side and a back side, respectively. - The liquid
crystal display device 10 has a rectangular flat box shape as a whole and includes a liquid crystal panel (an example of a display panel) 11 and a backlight unit (an example of a lighting device) 20, as illustrated inFIG. 1 . Theliquid crystal panel 11 is configured to display images. Thebacklight unit 20 is arranged on a back side of theliquid crystal panel 11 and supplies light for display to theliquid crystal panel 11. Theliquid crystal panel 11 and thebacklight unit 20 are integrally held with a fixing tape. - The liquid
crystal display device 10 may be mounted in a dashboard of a car as a part of an instrument panel to display a portion of meters of the instrument panel, various kinds of alarm images, map images of a car navigation system, or images taken by a built-in camera. - Details of the
liquid crystal panel 11 are not illustrated. Theliquid crystal panel 11 has a known configuration and includes a pair of rectangular substrates that are bonded to each other while having a predetermined gap therebetween and a liquid crystal layer between the substrates. Each of the substrates includes a glass substrate having high transmissivity such as non-alkaline glass and includes multiple films layered on each glass substrate with the known photolithography method. - One of the pair of the substrates on the back side (on a lower side in
FIG. 3 ) is an array substrate and switching components (such as TFTs), pixel electrodes, and an alignment film are arranged on the array substrate. The switching components are connected to source lines and gate lines that are perpendicular to each other. The pixel electrodes are connected to the switching components. The other one of the substrates on the front side (on an upper side inFIG. 3 ) is a CF substrate. Color filters, a counter electrode, and an alignment film are arranged on the CF substrate. The color filters include color portions of red (R), green (G), and blue (B) that are arranged with predetermined alignment. The source lines, the gate lines, and the counter electrode are supplied with image data and various kinds of control signals, which are necessary for displaying images, from a control circuit board. Polarizing plates are bonded to outer surfaces of the substrates, respectively. Theliquid crystal panel 11 displays images thereon with using light supplied by thebacklight unit 20 and a front side thereof is a light exit side. - As illustrated in
FIGS. 1 and 3 , the backlight unit 20 (one example of a lighting device) includes achassis 21 having a rectangular shallow plate shape, aframe 25 extending along an outer edge of thechassis 21, and alight exit member 24 that is arranged in thechassis 21. Light having plate shape as a whole exits thelight exit member 24. Thebacklight unit 20 has substantially a block-like shape having a laterally elongated rectangular planar shape as a whole similar to theliquid crystal panel 11. - The
chassis 21 is made of metal such as an aluminum plate or an electrogalvanized zinc-coated steel sheet (SECC). Thechassis 21 includes abottom plate 22 and awall 23. Thebottom plate 22 is a rectangular plate like theliquid crystal panel 11 and thewall 23 extends from a whole outer edge of thebottom plate 22 toward the front side (the light exit side). Thechassis 21 has a rectangular shallow plate shape as a whole and has anopen section 21A opening toward the liquid crystal panel 11 (the front side) as described before. - Although details of the
light exit member 24 are not illustrated, thelight exit member 24 arranged in thechassis 24 includes light emitting diodes 30 (LEDs), which are a light source, a LED board on which the LEDs are mounted, a light guide plate having a plate shape, an optical sheet, and a reflection sheet. Light emitted by the LEDs is guided within the light guide plate. The optical sheet is disposed on the front side of the light guide plate. The reflection sheet is disposed on the back side of the light guide plate. - The
backlight unit 20 according to this embodiment is an edge light type (a side-light type) backlight unit of one-side light entering type in which light from the LEDs enters the light guide plate through one edge surface thereof. In thebacklight unit 20, the light from the LEDs is converted by the light guide plate into planar light and the converted light exits through anopen section 21A of thechassis 21 toward theliquid crystal panel 11 on the front side. Thelight exit member 24 is held in a predetermined position within thechassis 21 with a holding configuration. - The
frame 25 is made of resin such as white polycarbonate having high reflectance and includes aframe section 26 and a wall cover section 27. Theframe section 26 is opposite thebottom plate 22 and has a rectangular frame shape that covers an opening peripheral edge of theopen section 21A of thechassis 21. The wall cover section 27 projects from an outer edge of theframe section 26 toward the back side so as to surround thewall 23 of thechassis 21 from an outer peripheral side. Theframe 25 is fixed to thechassis 21 with a fixingtape 28 that is provided between theframe section 26 and an end surface of thewall 23 of thechassis 21. Thequid crystal panel 11 is fixed to an upper surface (a front side surface) of theframe section 26 with a fixing tape. - The
backlight unit 20 of the present embodiment further includes a reinforcingmember 30. The reinforcingmember 30 is made of metal material having rigidity higher than that of theframe 25, such as stainless and preferably stainless steel for spring. In a plan view of thebacklight unit 20 from theopen section 21A as illustrated inFIG. 2 , the reinforcingmember 30 extends along each of long sides (the Y-axis direction) that are opposite each other and extends continuously to a portion near short sides. As illustrated inFIG. 3 , the reinforcingmember 30 has a channel structure having a substantially U-shaped cross sectional shape. Each of the reinforcingmembers 30 holds the edge sections of thebacklight unit 20 with respect to the front-back direction (the vertical direction, the Z-axis direction). - More in detail, the reinforcing
member 30 includes a frame-side extending section 31, a chassis-side extending section 32, and a connectingsection 33. The frame-side extending section 31 overlaps theframe section 26 of theframe 25. The chassis-side extending section 32 is opposite the frame-side extending section 31, and theframe section 26 and thebottom plate 22 of thechassis 21 are sandwiched between the chassis-side extending section 32 and the frame-side extending section 31. The connectingsection 33 is outside the wall cover section 27 of theframe 25 and connects edge portions of the frame-side extending section 31 and the chassis-side extending section 32. The frame-side extending section 31 has a width dimension in a width direction (the X-axis direction) thereof that is smaller than that of theframe section 26. According to such a configuration, theliquid crystal panel 11 is placed on an uncovered portion of theframe section 26. The chassis-side extending section 32 has a width dimension in a width direction (the X-axis direction) thereof that is greater than that of the frame-side extending section 31. The pair of reinforcingmembers 30 increases the rigidity of thewhole backlight unit 20 and deformation such as warping or curving is less likely to be caused in thebacklight unit 20 having increased size or decreased thickness. The reinforcingmember 30 is fixed to theframe 25 with a belt-like fixing tape 34 that is provided between the connectingsection 33 and the wall cover section 27 of theframe 25. - Next, operations and effects will be described. The
backlight unit 20 of the present embodiment includes thelight exit member 24, thechassis 21, theframe 25, and the reinforcingmembers 30. Light exits thelight exit member 24. Thechassis 21 includes thebottom plate 22, thewall 23 extending upward from the outer peripheral edge of thebottom plate 22, and theopen section 21A that is opposite thebottom plate 22. Thelight exit member 24 is mounted inside thechassis 21. Theframe 25 includes theframe section 26 and the wall cover section 27. Theframe section 26 is opposite thebottom plate 22 and the opening edge of theopen section 21A is covered with theframe section 26. The wall cover section 27 extends from the outer peripheral edge of theframe section 26 toward thebottom plate 22 so as to cover the outer periphery of thewall 23. The reinforcingmember 30 is mounted on a portion of the outer peripheral portion of theframe 25. The reinforcingmember 30 includes the frame-side extending section 31, the chassis-side extending section 32, and the connectingsection 33. The frame-side extending section 31 extends along the outer periphery of theframe 25 and overlaps theframe section 26. The chassis-side extending section 32 is opposite the frame-side extending section 31, and theframe section 26 and thebottom plate 22 are sandwiched between the chassis-side extending section 32 and the frame-side extending section 31. The connectingsection 33 is outside the wall cover section 27 and connects the frame-side extending section 31 and the chassis-side extending section 32. - According to the above configuration, even if the
backlight unit 20 is increased in size or decreased in thickness, thebacklight unit 20 including the reinforcingmembers 30 has enough rigidity for keeping its shape without causing deformation such as warping or curving. Furthermore, the frame 7 is formed to have relatively low rigidity so as to absorb distortion, a mounting tolerance of thechassis 21, or twisting as a whole that is caused by the mounting tolerance. Namely, thebacklight unit 20 according to the present embodiment has both of rigidity for keeping the shape thereof and flexibility for sorbing distortion or twisting. Therefore, display unevenness of the liquidcrystal display device 10 that is caused by distortion or twisting of thebacklight unit 20 is less likely to occur. Thebacklight unit 20 including the reinforcingmembers 30 has rigidity with a reduced thickness. Therefore, thebacklight unit 20 is less likely to be deformed by vibration of a vehicle and noise is less likely to be caused by the contact of the components. - The
frame 25 has a rectangular plan view shape and the reinforcingmembers 30 are respectively mounted on a pair of long sides of theframe 25 that are opposite each other. Thebacklight unit 20 is likely to be warped and adversely affected by vibration in the long-side direction thereof, and according to the above configuration, the rigidity of thebacklight unit 20 in the long-side direction thereof is increased. Therefore, much better effects can be obtained compared to a configuration including the reinforcing members on the short-side sections. - The reinforcing
member 30 made of stainless steel for spring is less likely to be deformed compared to that made of other material, and much better effects are obtained. - As illustrated in
FIG. 4 , a liquidcrystal display device 110 according to the present embodiment differs from the liquidcrystal display device 10 of the first embodiment in that acushion tape 135 is disposed between thechassis 21 and the reinforcingmember 30. Hereinafter, components same as those of the first embodiment are described with reference numbers adding 100 to those of the first embodiment and will not be described. - Hereinafter, reasons of providing such a
cushion tape 135 will be described. The dimension tolerance and the mounting tolerance of each component are increased according to the increase of the size of abacklight unit 120. Therefore, a connecting section 133 of the reinforcingmember 130 preferably has a greater dimension so as to absorb the increased tolerances. If the reinforcingmember 130 has a dimension that cannot absorb the tolerances, the reinforcingmember 130 may be forcefully mounted on achassis 121 and aframe 125. In such a case, alight exit member 124 within thechassis 121 may be distorted. - On the other hand, in a liquid crystal display device used in a section that may receive vibration such as a car, if a space is crated between the reinforcing
member 130 and each of thechassis 121 and theframe 125, looseness is created between the components by the vibration of a vehicle and the components may be hit each other, and noise is likely to be caused. Particularly, thechassis 121 and the reinforcingmembers 130 are made of metal material, as described before, and a cover glass and a touch panel are disposed on aliquid crystal panel 111 and this increases weight. Therefore, noise that may be caused between thechassis 121 and the reinforcingmembers 130 may be a serious problem. The reinforcingmembers 130 are preferably mounted on thechassis 121 tightly such that no space is created between at least thechassis 121 and the reinforcingmembers 130 to restrict noise. - The present embodiment is configured to include the cushion tape 135 (one example of cushioning material) between a
bottom plate 122 of thechassis 121 and a chassis-side extending section 132 of the reinforcingmember 130. The space between thebottom plate 122 and the chassis-side extending section 132 can be filled with thecushion tape 135 that can follow deformation. Thecushion tape 135 is made of porous material that is good in shock absorbing properties. Thecushion tape 135 has a belt-like shape extending along a long-side outer edge of thebottom plate 122 of thechassis 121 and is attached to thechassis 121 with a double-sided adhesive tape. Thecushion tape 135 is not necessarily disposed over an entire area of a portion of thebottom plate 122 of thechassis 121 opposite the chassis-side extending section 132; however, thecushion tape 135 is preferably disposed on a portion near a border between thebottom plate 122 and awall 123. Thecushion tape 135 preferably extends to ends of the reinforcingmember 130 in a length dimension thereof. - In detail, the
cushion tape 135 includes afiat portion 135A and abent portion 135B. Thecushion tape 135 is attached to thechassis 121 such that theflat portion 135A covers at least a flat surface area of thebottom plate 122 of thechassis 121 and thebent portion 135B covers at least a portion of a curved surface area of thechassis 121. Thecushion tape 135 has a starting point P at which thecushion tape 135 starts to be bent from the flat area toward thewall 123. Thecushion tape 135 includes theflat portion 135A and thebent portion 135B that extends from theflat portion 135A via the starting point P. As illustrated inFIG. 4 , according to the present embodiment, thecushion tape 135 is attached to thebottom plate 122 such that one edge side portion (a left side portion inFIG. 4 ) with respect to the width direction (the X-axis direction) is slightly away from the chassis-side extending section 132 when the reinforcingmember 130 is mounted on thechassis 121 and theframe 125. According to such a configuration, thecushion tape 135 is less likely to be removed from thechassis 121 when the reinforcingmember 130 is mounted on theframe 125 and thechassis 121. Furthermore, even if the border section between thebottom plate 122 and awall 123 has a shape projecting outwardly due to a bending stress, the projected portion is less likely to be contacted with the reinforcingmember 130 directly by the vibration. The thickness of thecushion tape 135 that can restrict noise is about 0.1 mm or more. - The present embodiment has following operations and effects in addition to the operations and effects similar to the first embodiment. According to the
light unit 120 according to this embodiment, thecushion tape 135 is disposed between thebottom plate 122 and the chassis-side extending section 132. Therefore, even if thechassis 121 and the reinforcingmember 130 are made of metal, looseness is less likely to be created between the components due to the vibration of a vehicle, and themetal chassis 121 and the reinforcingmember 130 are less likely to be hit each other, and noise is less likely to be caused. - The
cushion tape 135 extends from thebottom plate 122 toward thewall 123 while having the starting point P at which thecushion tape 135 starts to be bent therebetween. With such a configuration, even if the border section between thebottom plate 122 and thewall 123 of thechassis 121 has a shape projecting outwardly, the projected portion is less likely to be contacted with the reinforcingmember 130 directly by the vibration and noise is less likely to be caused. Further, thecushion tape 135 is less likely to be removed from thechassis 121 when the reinforcingmember 130 is mounted on thechassis 121. - The present technology is not limited to the embodiments described in the above and the drawings but the embodiments described below may be included in the technical scope.
- (1) In the above embodiments, the
backlight devices members - (2) In the above embodiments, the liquid
crystal display devices backlight units backlight unit 220 may have a circular plan view shape and a disk-like overall shape (seeFIG. 5 ). In such a configuration, thebacklight unit 220 may include a reinforcingmember 230 that is divided into three reinforcingmembers 230 in three directions in a plan view of thebacklight unit 220, and each reinforcingmember 230 extends along an outer periphery of aframe 225. The reinforcingmembers 230 may be provided in any numbers and any directions. The reinforcingmembers 230 are preferably disposed so as to restrict distortion and twisting of thebacklight unit 220 caused by distortion of the reinforcingmember 230 itself. The liquid crystal display device and the backlight unit may have various shapes such as a fan shape, a polygonal shape, and an oval shape. - (3) As illustrated in
FIG. 6 , the present technology may be applied to a curved liquidcrystal display device 310 and acurved backlight unit 320 including a curved surface. In such a configuration, a reinforcingmember 330 may be formed to be along aframe 325 so as to be mounted on theframe 325. The reinforcingmember 330 may be mounted on any edge of thebacklight unit 320. - (4) In the above embodiments, the
chassis members - (5) In the second embodiment, the cushioning material disposed between the
bottom plate 122 of thechassis 121 and the chassis-side extending section 132 of the reinforcingmember 130 is thecushion tape 135 made of porous material; however, the cushioning material is not necessarily the one described in the above embodiment but may be elastic material such as rubber. The cushioning material may be any material as long as it is deformable to fill a space and restrict hitting caused by the vibration. - (6) In the second embodiment, the
cushion tape 135 that is disposed between one reinforcingmember 130 and thechassis 121 has a continuous belt like shape; however, thecushion tape 135 does not necessarily have the shape of the above embodiment. For example, the cushion tape may be divided into belt-like pieces and multiple cushion tapes may provided for one reinforcingmember 130. - (7) In the second embodiment, the
cushion tape 135 is attached to thechassis 121; however, thecushion tape 135 may be attached to the reinforcingmember 130. In such a configuration, thecushion tape 135 may preferably extend to a portion of thewall 123 over the starting point P at which thecushion tape 135 starts to be bent from thebottom plate 122. - (8) The cushion tape may not necessarily extend over the starting point P but may be provided only between the
bottom plate 122 and the chassis-side extending section 132. - (9) The above embodiments include the edge light
type backlight units - (10) The configurations, the mounting mechanism, and the fixing structure of the
chassis frame - (11) In the above embodiments, the
liquid crystal panel - (12) The components included in the display device and the lighting device may not be limited to those of the above embodiments. Configurations including other components such as a bezel, a cover glass, or a touch panel may be included in the technical scope.
Claims (5)
1. A lighting device comprising:
a light exit member configured to exit light;
a chassis including a bottom plate, a wall that extends from an outer peripheral portion of the bottom plate, and an open section opposite the bottom plate, the chassis in which the light exit member is arranged;
a frame including a frame section and a wall cover section, the frame section being disposed opposite the bottom plate and covering an open edge of the open section, and the wall cover section extending from an outer peripheral edge of the frame section toward the bottom plate and covering an outer periphery of the wall; and
a reinforcing member disposed on at least a portion of an outer periphery of the frame, the reinforcing member including
a frame-side extending section extending along the outer periphery of the frame and overlapping the frame section,
a chassis-side extending section disposed opposite the frame-side extending section, and the frame-side extending section and the chassis-side extending section holding the frame section and the bottom plate therebetween, and
a connecting section disposed on an outer side of the wall cover section and connecting the frame-side extending section and the chassis-side extending section.
2. The lighting device according to claim 1 , wherein the frame has a rectangular plan view shape and the reinforcing member is disposed on a pair of long sides of the frame.
3. The lighting device according to claim 1 , further comprising cushioning material disposed between the bottom plate and the chassis-side extending section, wherein
the chassis and the reinforcing member are made of metal.
4. The lighting device according to claim 3 , wherein the cushioning material extends from the bottom plate over a portion where the cushioning material starts to be bent toward the wall.
5. A display device comprising:
the lighting device according to claim 1 ; and
a display panel.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018203713A JP2020071941A (en) | 2018-10-30 | 2018-10-30 | Lighting device and display device |
JP2018-203713 | 2018-10-30 |
Publications (1)
Publication Number | Publication Date |
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US20200132924A1 true US20200132924A1 (en) | 2020-04-30 |
Family
ID=70328266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US16/661,560 Abandoned US20200132924A1 (en) | 2018-10-30 | 2019-10-23 | Lighting device and display device |
Country Status (2)
Country | Link |
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US (1) | US20200132924A1 (en) |
JP (1) | JP2020071941A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20200225538A1 (en) * | 2017-02-06 | 2020-07-16 | Sharp Kabushiki Kaisha | Liquid crystal display device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6199987B1 (en) * | 1998-02-25 | 2001-03-13 | Seiko Epson Corporation | Optical device, and projection display device including the same |
US20110096569A1 (en) * | 2008-07-10 | 2011-04-28 | Sharp Kabushiki Kaisha | Backlight device and flat display device using same |
US20140355304A1 (en) * | 2012-02-23 | 2014-12-04 | Sharp Kabushiki Kaisha | Light source module, and liquid crystal display device |
US20160306104A1 (en) * | 2015-04-15 | 2016-10-20 | Amtran Technology Co., Ltd | Display device and backlight module thereof |
-
2018
- 2018-10-30 JP JP2018203713A patent/JP2020071941A/en active Pending
-
2019
- 2019-10-23 US US16/661,560 patent/US20200132924A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6199987B1 (en) * | 1998-02-25 | 2001-03-13 | Seiko Epson Corporation | Optical device, and projection display device including the same |
US20110096569A1 (en) * | 2008-07-10 | 2011-04-28 | Sharp Kabushiki Kaisha | Backlight device and flat display device using same |
US20140355304A1 (en) * | 2012-02-23 | 2014-12-04 | Sharp Kabushiki Kaisha | Light source module, and liquid crystal display device |
US20160306104A1 (en) * | 2015-04-15 | 2016-10-20 | Amtran Technology Co., Ltd | Display device and backlight module thereof |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20200225538A1 (en) * | 2017-02-06 | 2020-07-16 | Sharp Kabushiki Kaisha | Liquid crystal display device |
US10795206B2 (en) * | 2017-02-06 | 2020-10-06 | Sharp Kabushiki Kaisha | Liquid crystal display device |
Also Published As
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JP2020071941A (en) | 2020-05-07 |
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